This part of YY/T 0873 specifies the coding numbers for the shapes of all dental rotary instruments and a series of accessories used to connect them. These 3 digits describing the shape constitute the third group of 3 digits in the 15-digit full array. The coding principle has been explained in YY/T 0873.1.
YY/T 0873.2-2014 history
2014YY/T 0873.2-2014 Dentistry.Nnmber coding system for rotary instruments.Part 2: Shapes